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MX-7000N  ADJUSTMENTS  6 – 37

5)

Image loss adjustment
When the adjustment item of the image loss below is set to the
default value, it is adjusted to the standard state.
If it is not in the above standard state, or when it is set to a
desired value, change these adjustment items.

Void area: 3.0mm, Image loss: 3.0mm

When the adjustment value is increased, the image loss is
increased. When the adjustment value is decreased, the
image loss is decreased.
When the adjustment value is changed by 1, the image loss is
changed by 0.1mm.

 

This adjustment is required in the following cases:
* The MFP control PWB has been replaced.
* The EEPROM on the MFP control PWB has been replaced.
* The scan control PWB has been replaced.
* The EEPROM on the scan control PWB has been replaced.
* The scanner (reading) section has been disassembled.
* The scanner (reading) unit has been replaced.
* When a U2 trouble occurs.
* The DSPF section has been disassembled.
* The DSPF unit has been replaced.
This adjustment is intended to adjust the scanner read position in
DSPF mode front face scan.
An incorrect adjustment would deviate the scanner stop position
from the required position, thus possibly causing a shadow of the
original table to appear at the leading edge of an image generated
by DSPF (front surface) mode scan.
1)

Make a copy in DSPF (front surface) mode, and make sure
that the printed image at the leading edge of the copied image
is free from shadows.

If the printed image at the leading edge of the copied image
contains a shadow of the original table, then do the following
steps.

2)

Enter the simulation 53-8 mode.

3)

Enter the adjustment value and press the [OK] key. 

Repeat the above adjustments until an acceptable result is
obtained.

 

This adjustment is required in the following cases:
* The MFP control PWB has been replaced.
* The EEPROM on the MFP control PWB has been replaced.
* The scan control PWB has been replaced.
* The EEPROM on the scan control PWB has been replaced.
* The scanner (reading) section has been disassembled.
* The scanner (reading) unit has been replaced.
* When a U2 trouble occurs.
* The DSPF section has been disassembled.
* The DSPF unit has been replaced.

1)

Enter the simulation 50-6 mode.

LEAD

Image loss 
adjustment 
value

Lead edge 
image loss 
adjustment 

0 – 99

30

3.0 

± 

1.0mm

SIDE

Side image 
loss 
adjustment

0 – 99

20

2.0 

± 

1.0mm

5mm

4

3

2

1

Paper lead edge

Copy area

Maginification ratio: 400%

Image area

Papar lead edge

Shadow image of SPF

A:

A : 50

;

ADJUST VALUE

SIMULATION NO.53-08

SPF SCANNING POSITION ADJUSTMENT

XX

1

99

OK

TEST

CLOSE

Image loss (LIL)

LIL = 1.5 mm
LV

= 3.5 mm

TV

= 3.5 mm

FV+RV= 7.0 mm

Papar lead edge

Papar tail edge

10

20

No Image

No Image

No Image

No Image

Void (TV)

Void (LV)

Void (FV)

Void (RV)

A : 50

;

SIDE1

B : 50

;

SIDE2

C : 20

;

LEAD_EDGE (SIDE1)

D : 20

;

FRONT_REAR (SIDE1)

A:

SIMULATION NO.50-06

LEAD EDGE ADJUSTMENT VALUE(SPF)

XX

1

99

OK

TEST

CLOSE

E : 30

;

TRAIL_EDGE (SIDE1)

F : 30

;

LEAD_EDGE (SIDE2)

G : 20

;

FRONT_REAR (SIDE2)

H : 20

;

TRAIL_EDGE (SIDE2)

MX-7000N  ADJUSTMENTS  6 – 38

(Leading edge image loss adjustment)
1)

Set the adjustment values for leading edge image loss (LEAD_
EDGE) for the front and back sides as follows: 
(Standard setting)
C: LEAD_EDGE (SIDE1): 15
F: LEAD_EDGE (SIDE2): 15
* Set the adjustment value for "C: LEAD_EDGE (SIDE1)" and

"F: LEAD_EDGE (SIDE2)" to 15 by entering "15" into the
(LEAD_EDGE) adjustment value field and then pressing the
[OK] key.

2)

In DSPF mode, make a duplex copy at 100% magnification,
and make sure that the leading edge image loss is 1.5 mm for
both the front and back sides. (Select duplex mode from the
paper selection mode as described in Simulation 50-6).

If an acceptable result is not obtained, do the following steps. 

3)

Repeat the process of changing the SIDE1 & SIDE2 adjust-
ment values and then pressing the [OK] key until attaining an
acceptable level.
SIDE1: Adjustment value for the position at which to read the
leading edge of the original in DSPF front side mode. 
SIDE2: Adjustment value for the position at which to read the
leading edge of the original in DSPF back side mode. 
(The adjustment value should be changed in steps of 0.1 mm.)
(The timing in which to start reading the image should be
determined based on the timing in which detector SPPD4
detects the leading edge of the original.) 

Repeat steps 2 to 3 until an acceptable result is obtained.
(Trailing edge image loss adjustment)
1)

In DSPF mode, make a duplex copy at 100% magnification,
and make sure that the trailing edge image loss is 1.5 mm for
both the front and back sides. (Select duplex mode from the
paper selection mode as described in Simulation 50-6).

If an acceptable result is not obtained, do the following steps.

2)

Repeat the process of changing the TRAIL_EDGE adjustment
value and then pressing the [OK] key until attaining an accept-
able level. 
Repeat the above adjustments until an acceptable result is
obtained.

(Front/rear frame direction image loss adjustment)
Set the front surface/back surface (FRONT_REAR) adjustment
value to 20 by entering "20" into the FRONT_REAR adjustment
value field and then pressing the [OK] key. 
Note that changing this adjustment value shifts the image position
in the front/rear frame direction.

 

This adjustment is required in the following cases:
* When the resist roller section is disassembled.
* When the LSU is replaced or removed.
* When a U2 trouble occurs.
* When the PCU PWB is replaced.
* When the EEPROM on the PCU PWB is replaced.
(Caution)
This adjustment is performed by the user to increase the lead edge
void area to greater than the standard value (3mm) in the printer
mode.

A

SIDE1

Front surface document 
scan start position 
adjustment (CCD)

50

B

SIDE2

Back surface document 
scan start position 
adjustment (CCD)

50

C

Image loss 
amount 
setting: 
SIDE1

LEAD_EDGE 
(SIDE1)

Front surface lead edge 
image loss amount setting

20

D

FRONT_REAR 
(SIDE1)

Front surface side image 
loss amount setting

20

E

TRAIL_EDGE 
(SIDE1)

Front surface rear edge 
image loss amount setting

30

F

Image loss 
amount 
setting: 
SIDE2

LEAD_EDGE 
(SIDE2)

Back surface lead edge 
image loss amount setting

30

G

FRONT_REAR 
(SIDE2)

Back surface side image 
loss amount setting

20

H

TRAIL_EDGE 
(SIDE2)

Back surface rear edge 
image loss amount setting

20

Papar lead edge

TIL = 1.5 mm
TV = 3.5 mm

Image area

Void (TV)

Image loss (TIL)

No Image

Papar trail edge

TIL = 1.5 mm
TV = 3.5 mm

Image area

Void (TV)

Image loss (TIL)

No Image

MX-7000N  ADJUSTMENTS  6 – 39

1)

Enter the simulation 50-05 mode.

2)

Select the set item E with the scroll key, and enter the value
corresponding to the paper feed tray with A4 (11 x 8.5) paper
in it.

3)

Press [EXECUTE] key.
The adjustment pattern is printed.

4)

Measure the distance from the paper lead edge the adjustment
pattern to the image lead edge, and check to confirm that it is
in the standard adjustment value range.
Standard adjustment value: 3.0 

± 2.0mm

If the above condition is not satisfied, perform the following
procedures.

5)

Select the adjustment target of the paper feed mode adjust-
ment item DENC with the scroll key.

6)

Change the adjustment value.
Enter the adjustment value and press [OK] or [EXECUTE] key.
When [EXECUTE] key is pressed, the adjustment pattern is
printed.
When the adjustment value is increased, the distance from the
paper lead edge to the image lead edge is increased. When
the adjustment value is decreased, the distanced is
decreased.
When the set value is changed by 1, the distance is changed
by about 0.1mm.

Repeat the procedures 4) – 6) until the condition of 4) is satisfied.

A : 30

;

DEN-C

B : 20

;

DEN-B

C : 20

;

FRONT/REAR

D : 1

;

MULTI COUNT

A:

SIMULATION NO.50-05

LEAD EDGE ADJUSTMENT VALUE (PRINTER)

XX

1

99

OK

TEST

CLOSE

E : 2

;

PAPER : CS1

F :

1

;

DUPLEX : NO

EXECUTE

A : 40

;

DEN-C

B : 20

;

DEN-B

C : 20

;

FRONT/REAR

D : 1

;

MULTI COUNT

A:

SIMULATION NO.50-05

LEAD EDGE ADJUSTMENT VALUE (PRINTER)

XX

1

99

OK

TEST

CLOSE

E : 2

;

PAPER : CS1

F :

1

;

DUPLEX : NO

EXECUTE

End of print

EXECUTE

EXECUTE

A

DEN-C

Printer print image lead edge adjustment

1 – 99

30

3.0 

± 2.0mm

D

MULTI COUNT

Print quantity

1 – 999

1

—

E

PAPER

MFT

Cassette select

Manual feed

1 – 6

1

2 (CS1)

CS1

Cassette 1

2

CS2

Cassette 2

3

CS3

Cassette 3

4

CS4

Cassette 4

5

LCC

LCC

6

F

DUPLEX

YES

Duplex print select

Select

0 – 1

0

1 (NO)

3.0±2.0mm

MX-7000N  ADJUSTMENTS  6 – 40

 

(1) Note before execution of the copy color balance/density
adjustment
* After completion of this adjustment, the printer color balance/

density adjustment must be executed.

* Requisite conditions before execution of the copy color balance/

density adjustment
Before execution of the copy color balance/density adjustment,
check to insure that the adjustments which affect the copy color
balance/density adjustment have been completed.
The importance levels of them are shown below.

(The following items affect the copy color balance/density
adjustment, and must be checked and adjusted before execu-
tion of the image quality adjustments.)
1)

The following adjustment items must be adjusted properly.

2)

The set values of the following simulations must be set to the
default values.

3)

The following items (correction functions) of SIM 44-1 must be
set to ENABLE (default).

ADJ 

7

Image density 
sensor, image 
registration 
sensor 
adjustment

7A

Color image density sensor 
calibration

44-13

7B

Color image density sensor, 
black image density sensor, 
image registration sensor 
adjustment

44-2

ADJ 

8

Image skew adjustment (LSU (writing) unit)

61-4

ADJ 

9

OPC drum phase adjustment (Auto adjustment)

50-22

ADJ 

12

Image 
registration 
adjustment 
(Print engine 
section)

12A

Image registration adjustment 
(Main scanning direction, sub 
scanning direction) (Auto 
adjustment) 

50-22

12B

Image registration adjustment 
(Main scanning direction) 
(Manual adjustment)

50-20

12C

Image registration adjustment 
(Sub scanning direction) 
(Manual adjustment)

50-21

46-1

A – U

50

46-2

A – L

50

46-10

A – O

500

46-16

A – O

500

HV

Normal operation high-density 
process control YES/NO setting

Normal 
(Inhibit: 1: 
NO)
Highlighted 
(Allow: 0: 
YES)

Allow

HT

Normal operation half-tone 
process control YES/NO setting

Allow

TC

Transfer output correction YES/
NO setting

Allow

MD VG

Membrane decrease grid voltage 
correction YES/NO setting

Allow

MD LD

Membrane decrease laser power 
voltage correction YES/NO 
setting

Inhibit

MD EV

Membrane decrease 
environment grid voltage 
correction YES/NO setting

Allow

MD DL

Membrane decrease discharge 
light quantity correction YES/NO 
setting

Allow

MD DL EV

Membrane decrease 
environment discharge light 
quantity correction YES/NO 
setting

Inhibit

TN_HUM

Toner density humidity correction 
YES/NO setting

Allow

TN_AREA

Toner density area correction 
YES/NO setting

Allow

TN_LIFE

Toner density life correction 
YES/NO setting

Allow

TN_COV

Toner density print rate 
correction YES/NO setting

Allow

TN_PROCON

Toner density process control 
correction YES/NO setting

Allow

TN_ENV

Toner density environment 
correction YES/NO setting

Allow

TN_DRIP

Toner density correction, 
unconditional supply YES/NO 
setting

Allow

TN_SPEND

Toner compulsory consumption 
mode YES/NO setting

Allow

PHT

1Pixel half-tone process control 
correction YES/NO setting

Inhibit

AR_AUTO

Auto resist adjustment YES/NO 
setting

Allow

AR_ERROR

Error check YES/NO setting 
during auto resist adjustment

Allow

DM_PHASE

Drum phase alignment YES/NO 
setting

Allow

SENSITIVITY

Toner density correction YES/NO 
setting

Inhibit

PRT_HT

Half tone process control printer 
correction feedback Enable/
Disable setting

Allow